I bought this tube in Idaho on my cross country tour, and put it on my rear(load bearing) tire. I would estimate that I got 5 flats on this tube over the course of the tour, and each time the tire sealed itself and I was able to move on with no issue. In fact, it wasn't until the 6th flat in Florida that it failed, and I think a screwdriver went through my tire that time.
It's a little heavier, but any tube that can take me across most of the country and requires zero maintenance is a winner in my book.